Hi, srinivas bakki wrote: > i tried flushing the queue in the bottom half using > flush_workqueue. but this crashes saying .. trying to sleep in the interrupt > context !!! whereas the bottom half runs in the context of a kernel thread. any > hint of why this scheduling could be failing would be very helpful. > Thank you for ur patient reading. AFAIK, bottom halves run in « interrupt context », i.e in_interrupt() is true while running bottom halves. Extracts from « Linux Device Drivers » : « The Linux kernel has two different mechanisms that may be used to implement bottom-half processing, both of which were introduced in Chapter 7. Tasklets are often the preferred mechanism for bottom-half processing; they are very fast, but all tasklet code must be atomic. The alternative to tasklets is workqueues, which may have a higher latency but that are allowed to sleep. » « Remember that tasklets are a special function that may be scheduled to run, in software interrupt context, at a system-determined safe time.» See http://lwn.net/Kernel/LDD3/. Sincerly, Thomas -- Thomas Petazzoni thomas.petazzoni@xxxxxxxx -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/
